Integrated steam generator of reactor

Abstract

The invention provides an integrated steam generator of a reactor. The integrated steam generator is characterized in that a tube bundle sleeve which is of an omega-shaped structure is arranged on an inner-wall barrel and an outer-wall barrel of the integrated steam generator, and heat transfer tube bundles are arranged between the tube bundle sleeve and the inner-wall barrel; the tube bundle sleeve comprises an outer sleeve of the tube bundle sleeve and an inner sleeve of the tube bundle sleeve, and the top of the inner sleeve of the tube bundle sleeve is hermetically connected with the top of the outer sleeve of the tube bundle sleeve; a steam connecting tube is arranged on a lower section of the outer-wall barrel, and a water supply connecting tube is arranged on an upper section of the outer-wall barrel and extends to the outer sleeve of the tube bundle sleeve; and the bottom of the outer sleeve of the tube bundle sleeve and the outer-wall barrel are connected with each other to form a connected section, and the connected section is positioned below the steam connecting tube. The integrated steam generator with the structure has the advantages that heat expansion among the tube bundles and the outer-wall barrel is balanced, and the water supply connecting tube is positioned at a high location, and accordingly is high in water storage capacity and accident mitigation capacity when broken; and water and steam are physically isolated from each other owing to the tube bundle sleeve structure, and water supply distribution space and steam buffer space are provided.

Description

technical field [0001] The invention relates to the design field of a steam generator of a nuclear power plant reactor, in particular to a steam generator of a small modular reactor. Background technique [0002] In the pressurized water reactor nuclear power plant, the steam generator (steam generator, SG) is an important equipment that transfers the heat of the primary circuit coolant to the secondary circuit water, and makes the secondary circuit water generate saturated or superheated steam. The steam generators used in pressurized water reactors can be roughly divided into four types according to their heat transfer tube forms: U-shaped tube type, straight tube type, spiral tube type, and casing type. [0003] The U-shaped tube steam generator is the most widely used in the active pressurized water reactor nuclear power plant, and its heat transfer tube is in the shape of the English letter U. The two ends of the U-shaped tube are connected with the same tube plate by ...

AI Technical Summary

Problems solved by technology

This kind of steam generator has great difficulties in flow channel and structural design, heat transfer tube manufacturing, heat transfer tube assembly and welding, inspection and maintenance, etc.

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